Brain haemorrhage

Spontaneous rupture or injury, causing bleeding, in or around the brain. There are four types of brain haemorrhage: subdural, extradural, subarachnoid and intracerebral. Extradural and subdural haemorrhages are often caused by a blow to the head. Subarachnoid and intracerebral generally occur spontaneously due to the rupture of aneurysms or small blood vessels in the brain.